At 03.22 hours on 7 June 1940, U-48 fired a torpedo at the unescorted Eros about 15 miles 52° of Tory Island and scored a hit after 4 minutes 34 seconds. The shot fell from a distance of about 3000 metres because the vessel was fast and the proximity of land prevented a chase on the surface. The U-boat left the area after the crew abandoned the burning ship.